look up any word, like donkey punch:
 
1.
An old Irish name, meaning 'shining star.' You cannot find a more accurate definition then that because not all Etains are the same, you could not find a definition here that defines all Etains. Nuff said.
My best friend is called Etain.
by Odd Girl Out September 17, 2012
 
2.
Etain means the worst type of aids and herpes there possibly is. No one likes Etain as it is a disease.
I had sex with a girl last night and I think I have Etain.
by johnding February 06, 2014